Senses Part 1

When we look at close objects, muscles around the lens...

• contract and flatten the lens to refract light

• relax to make the lens rounder

• relax to make the lens more transparent so it can refract better

• contract and flatten the lens to make it thinner

What role does the optic nerve play?

• It brings blood to the retina

• It is a conductor that sends electrical signals from the retina to the brain

• It is a receptor neuron responsible for vision

• It is the analyzer of the occipital lobe (back of the brain)

The part of the optic nerve attached to the retina is

• the blind spot because the head of the optic nerve is transparent

• the macula, an area rich in photoreceptors

• the blind spot because it does not contain photoreceptors

• not the blind spot

Which part of the eye controls how much light enters the eye?

Where are taste buds are taste receptors located?

• In the olfactory epithelium

• On your gums

• On the inside of your cheeks

• On the papillae

Where are odour sensitive receptor neurons located in the nose?

• On the olfactory epithelium

• In the olfactory nerve

• On papillae that line the nasal cavity

• In the sinus cavity

What is the role of the mucus (in the nose)? Can be more than 1.

• It has no specific role?

• Protects against bacteria

• Moistens the air

• Helps us smell better

What stimulates our sense of smell?

• Mechanical waves

• Electromagnetic waves (light)

• Chemical molecules

• Temperature

What would be the taste associated with ice cream?

Which of the following is not a taste our tongue can taste?

• Sour

• Umami

• Spicy

• Bitter